From 7e04a2e72be6fe7baa10b881f2bcdde268c226cc Mon Sep 17 00:00:00 2001
From: Axel Bocciarelli <axelboc@gmail.com>
Date: Thu, 19 Nov 2015 11:26:28 +1100
Subject: [PATCH] trigger events on update

Dispatch the custom events on `Ps.update`:

```
container.scrollTop = 50;
Ps.update(container);
```

This is useful for controlling the scroll position via left/right
arrows and enabling/disabling these arrows on scroll or when the
start/end is reached. This also allows for the events to be dispatched
on page load by calling `Ps.update` right after `Ps.initialise`.
---
 src/js/plugin/update.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/js/plugin/update.js b/src/js/plugin/update.js
index 6d0edfd..8bd0c74 100644
--- a/src/js/plugin/update.js
+++ b/src/js/plugin/update.js
@@ -6,7 +6,8 @@
 var d = require('../lib/dom')
   , h = require('../lib/helper')
   , instances = require('./instances')
-  , updateGeometry = require('./update-geometry');
+  , updateGeometry = require('./update-geometry')
+  , updateScroll = require('./update-scroll');
 
 module.exports = function (element) {
   var i = instances.get(element);
@@ -29,6 +30,10 @@ module.exports = function (element) {
   d.css(i.scrollbarYRail, 'display', 'none');
 
   updateGeometry(element);
+  
+  // Update top/left scroll to trigger events
+  updateScroll(element, 'top', element.scrollTop);
+  updateScroll(element, 'left', element.scrollLeft);
 
   d.css(i.scrollbarXRail, 'display', '');
   d.css(i.scrollbarYRail, 'display', '');